Portable boring machine



Nov. 11, 1952 s. c. KUTA PORTABLE BORING MACHINE Filed March 27, 1950 will Luv/Z M Stanley 0. Kufa INVENTOR.

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Patented Nov. 11, 1952 ,UNlTEusT-Arizs rAT-ENT 2,617,455 PORTABLE. BORING MACHINE Stanley 0. Kuta, Cedar Rapidslowa Application March 27, 1950,, Serial No. 152,106

. .1 'This'invention relates to 'new" and useful improvementsand structural refinements in portvableboring'machines, and the principal object of the-invention is to-facilitate boring or drilling oi -holes in- 'diflicult places, sucli'asfor example, in wall studs fioorjoists, rafters, or the like.

Some of the advantages of the invention reside in its simplicity of construction, in its convenient: and efficient operation, in its adju'stability for various working conditions, and in its adaptability to economical manufacture.

With the above more important objects and features in view, and such other objects andfeatures as may become apparent as this specification proceeds, the invention consists essentially of the arrangement and construction of parts as illustrated in the accompanying drawings, in which:

Figure 1 is a perspective view of the invention;

Figure 2 is a fragmentary vertical sectional view thereof, and

Figure 3 is a transverse sectional view, taken substantially in the plane of the line 3-3 in Figure 2.

Like characters of reference are employed to designate like parts in the specification and throughout the several views.

Referring now to the accompanying drawings in detail, it will be seen that the embodiment of the invention which has been illustrated comprises a hollow, preferably tubular standard l2 which is provided at the upper end thereof with a gear case I4. A tubular extension [6 of this gear case projects downwardly into the standard I 2 and is provided in the interior thereof with a tubular bushing I8, both the extension l6 and the bushing [8 being secured against rotation in the standard [2 by suitable set screws 20.

The lower end portion of the standard 12 has secured therein by'a set screw 22 a bushing 24, the two bushings IB, 24 providing bearings for a drive shaft 26 which extends longitudinally in the standard 12 and projects downwardly from the standard for connection to the usual chuck 28 of a conventional electric hand drill 30. End thrust washers 32, 34 are provided on the shaft 26 to abut the inner end of the bushing 24, and it is to be noted that the inner end of the shaft 26 projects into the gear case M and has rigidly secured thereto a bevel gear 36. If desired, a washer 38 may be interposed between this gear and the inner end of the bushing l8, as shown.

The gear case l4 includes a removable cover 40 which is secured thereto by a plurality of 3 Claims. (Cl. 144-105) '2 screws 42, asuitable gasket 44 being provided between the cover and the main body portionof thegear case, and it is tobe noted that the gear case as well as the cover thereof'are provided with inward, tubularextensions- 46,41, which accommodaterespectivebearings 4'8, 50 in which a driven shaft 52 is journaled.

1A. .bevel gear 54, :secured to the shaft :52 in the gear case I4 meshes with the aforementionedgear 36, thereby operatively connecting the shafts 26, 52 together. The driven shaft 52 projects outwardly from the cover 40 of the gear case I4 substantially at right angles to the drive shaft 26 and the projecting portion of the driven shaft has connected thereto by means of a coupling 56 a suitable boring tool 58.

The aforementioned hand drill 30 receives a supply of electric current through the medium of a conductor 60, the latter being provided with a switch 62 which is preferably mounted on the standard 12, as illustrated in Figure 1.

A sleeve 64, provided with a plurality of set screws 66, is slidably and rotatably mounted on the standard I2 and has secured thereto an arcuate arm 68 which is offset laterally from the standard and extends downwardly beyond the lower end of the drive shaft 26 and beyond the hand drill 30, substantially as shown. The lower extremity of the arm 68 may be provided with a transverse sustaining bar 10 which may rest on a floor, or the like, to facilitate rocking of the entire machine in a vertical plane for feeding the tool 58 into the work, and if desired, the operator may place his feet on the bar 10 so as to prevent any shifting or displacement of the machine.

The usual laterally projecting handle 12 with which the hand-drill 30 is provided extends over the arm 68 and a sleeve 14 fits loosely on the arm so that it may be slid longitudinally thereon. This sleeve carries a suitable screw clamp 16 which may be used for tightening or clamping thefhandle 12 against the sleeve 14, thus sustaining the hand drill 30 in position.

The operating height or level of the tool 58 above the floor or above the bar 10 may be varied by simply loosening the set screws 66 and sliding the sleeve 64 on the standard l2, and cor respondingly Sliding the sleeve 14 on the arm 68. The latter adjustment also facilitates the use of different hand drills with the invention, as will be clearly apparent.

It is believed that the advantages and use of the invention will be readily understood from the foregoing disclosure and, accordingly, further *omw I 3 description thereof at this point is deemed unnecessary.

While in the foregoing there has been shown and described the preferred embodiment of this invention it is to be understood that minor changes in the details of construction, combination and arrangement of parts may be resorted to without departing from the spirit and scope of the invention as claimed.

Having described the invention, what is claimed as new is:

1. In a portable boring machine, the combination of a tubular standard, a drive shaft rotatably journaled in and projecting outwardly from said standard, a laterally ofiset support arm attached to the standard and extending beyond the outer end of said shaft, a hand drill including a chuck connected to the outer end portion of the drive shaft, a laterally projecting handle provided on said hand drill, and a clamp provided on said support arm for clamping said handle thereto.

2. The device as defined in claim 1 together with a transverse sustaining bar provided at the outer end of said support arm.

, 3. A portable boring machine comprising a tubular housing a drive shaft journaled in said housing, a driven shaft operatively connected to one end of the drive shaft, an electric hand drill operatively connected to the other end of said drive shaft for actuating same, said drill including a handle, a support arm, means adjustably connecting one end of said support arm to the housing for longitudinal sliding adjustment, said support arm extending laterally of the housing and beyond the drill and terminating, at its other end, in substantially longitudinal alignment with said housing, and means adjustably securing the drill handle to said arm.

STANLEY C. KUTA.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Switzerland Feb. 17, 1936 

